#include <stdio.h>
#include <stdlib.h>

static void f1(void){

	puts("f1() is working!");

}

static void f2(void){
	puts("f2() is working!");

}

static void f3(void){
	puts("f3() is working!");

}
int main(){
	puts("Begin!");
	atexit(f1);
	atexit(f2);
	atexit(f3);
	puts("End!");
	exit(0);
}
